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1. I have solved the mobile health bar issues in Copper and Stone Enhanced
2. Pet Window was taken out in favor of mobile health bars, but Axel has stated: We're gonna get the Pet Window back in.
The issue with renaming pets will be resolved once Pub66 goes out to all shards. We've switched the process from clicking on the name in the Pet Window to having a context menu option on the pet itself. This will prevent players accidentally renaming pets when they simply want to target it.
3. They are aware and are working on it, and as much as it annoys me as well, their response is they're working on it and that the EC is still in "beta".